dipotassium dioxochromiumbis(olate)

• ChemBase ID: 105868
• Molecular Formular: CrK2O4
• Molecular Mass: 194.1903
• Monoisotopic Mass: 193.84757934
• SMILES: [K+].[K+].[O-][Cr](=O)(=O)[O-]
• Canonical SMILES: [O-][Cr](=O)(=O)[O-].[K+].[K+]
• InChI: InChI=1S/Cr.2K.4O/q;2*+1;;;2*-1
• InChIKey: XMXNVYPJWBTAHN-UHFFFAOYSA-N

NAMES AND DATABASE IDS

Names

• IUPAC name: dipotassium dioxochromiumbis(olate)
• IUPAC Traditional name: dipotassium chromate(2-); dipotassium ion chromate(2-)
• Synonyms: Potassium chromate; Chromic acid; (K2CrO4d; dipotassium salt; Potassium chromate; Bipotassium Chromate; Dipotassium Monochromate; POTASSIUM CHROMATE ACS REAGENT GRADE; Chromium(VI) atomic spectroscopy standard concentrate 10.00 g Cr(VI); Potassium chromate solution; Potassium chromate solution; Chromium(VI) atomic spectroscopy standard concentrate 1.00 g Cr(VI); Potassium chromium(VI) oxide; Potassium chromate, ACS; Chromate, Ion chromatography standard solution, Specpure®, CrO4?; 铬酸钾; 铬(VI) 标准浓缩液 10.00g Cr(VI); 铬酸钾 溶液; 铬酸钾 溶液; 铬(VI) 原子光谱分析标准浓缩液 1.00g Cr(VI); 铬酸钾, ACS; 1000 g/ml

Database IDs

• CAS Number: 7789-00-6
• EC Number: 232-140-5; 231-157-5
• MDL Number: MFCD00011368
• Merck Index: 147622
• PubChem SID: 24877684; 162092619; 24845359; 24861756; 24852968; 24858896; 24847490
• PubChem CID: 24597
• Wikipedia Title: Potassium_chromate

CALCULATED PROPERTIES

• Acid pKa: -2.30103
• H Acceptors: 4
• H Donor: 0
• LogD (pH = 5.5): -6.720884
• LogD (pH = 7.4): -7.0465326
• Log P: -2.5252
• Molar Refractivity: 5.7716 cm^3
• Polarizability: 6.1887565 Å^3
• Polar Surface Area: 80.26 Å^2
• Rotatable Bonds: 0
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Solubility: 62.9 g/100 mL (20 °C) ; 79.2 g/100 mL (100 °C) in water; H2O: soluble; H2O: soluble1 M at 20 °C, clear, yellow; insoluble in alcohol; Soluble in water. Insoluble in alcohol
• Apperance: Crystalline; Liquid; solid; Yellow odorless powder
• Melting Point: 968°C; 971 °C(lit.); 975°C
• Boiling Point: 1000°C
• Density: 2.73; 2.7320 g/cm^3
• Refractive Index: 1.74
• Vapor Density: 6.7 (vs air)
• Odor: odorless
• pH: 8.5-10.0 (20 °C, 5%); 8.5-10.0 (25 °C, 1 M in H2O); 8.5-10.0 (25 °C, 50 mg/mL in H2O); 8.6-9.8 (20 °C, 5%); 8.6-9.8 (25 °C, 5%); 8.6-9.8 (25 °C, 50 mg/mL in H2O)

Safety Information

• Storage Condition: Room Temperature (15-30°C)
• RTECS: GB2940000
• European Hazard Symbols: Carc. Cat. 2; Dangerous for the environment (N); Irritant (Xi); Muta. Cat. 2; Nature polluting (N); Oxidising (O); Toxic (T); Toxic (T)
• UN Number: 3082; 3086; 3288; UN3087
• German water hazard class: 3
• Hazard Class: 5.1; 6.1; 9
• Packing Group: 3; II; III
• Australian Hazchem: 2W
• Risk Statements: 49-46; 49-46-36/37/38-43-50/53; 49-46-43-50/53; R:8-36/37/38-43-46-49-50/53; R49, R46, R36/37/38, R43, R50/53
• Safety Statements: 53-26-36/37-45-61; 53-36/37-45-61; 53-45-60-61; S:14-45-53-60-61; S53, S45, S60, S61
• EU Classification: TO2
• EU Hazard Identification Number: 6.1A
• Emergency Response Guidebook(ERG) Number: 141
• TSCA Listed: 是
• EU Index: 024-006-00-8
• GHS Pictograms: GHS07; GHS08; GHS09
• GHS Signal Word: Danger
• NFPA704:
  

  0

  3

  1

  OX
• GHS Hazard statements: H315-H317-H319-H335-H340-H350i-H410; H317-H340-H350i-H410; H340-H350; H340-H350-H400-H410-H315-H319-H317-H335
• GHS Precautionary statements: P201-P261-P273-P280-P305 + P351 + P338-P308 + P313; P201-P273-P280-P308 + P313-P501; P261-P305+P351+P338-P302+P352-P321-P405-P501A; P281-P201-P202-P308+P313-P405-P501A
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges; Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges; Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter
• RID/ADR: UN 3082 9/PG 3; UN 3288 6.1/PG 3

Product Information

• Purity: ≥99%; ≥97.0%; ≥98.5%; ≥99%; ≥99.0%; ≥99.0% (RT); ≥99.5%; ≥99.5% (RT); 98%; 99.0% min; 99.99% trace metals basis
• Concentration: 1/30 M K2CrO4 (0.1N); 10.00 g/L
• Grade: ACS; ACS reagent; JIS special grade; puriss.; puriss. p.a.; purum p.a.; REAGENT; SAJ first grade; technical
• Impurities: ≤0.005% in water insoluble matters; ≤0.005% insolubles; insoluble matter, passes filter test
• Cation Traces: Ca: ≤0.005%; Ca: ≤50 mg/kg; Cd: ≤10 mg/kg; Cd: ≤50 mg/kg; Co: ≤20 mg/kg; Co: ≤50 mg/kg; Cu: ≤10 mg/kg; Cu: ≤50 mg/kg; Fe: ≤20 mg/kg; Fe: ≤50 mg/kg; Mg: ≤10 mg/kg; Mg: ≤5 mg/kg; Mn: ≤10 mg/kg; Mn: ≤5 mg/kg; Na: ≤0.02%; Na: ≤1000 mg/kg; Na: ≤200 mg/kg; Ni: ≤20 mg/kg; Ni: ≤50 mg/kg; Pb: ≤50 mg/kg; Sr: ≤50 mg/kg; Zn: ≤10 mg/kg; Zn: ≤50 mg/kg
• Antion Traces: chloride (Cl-): ≤0.005%; chloride (Cl-): ≤10 mg/kg; chloride (Cl-): ≤1000 mg/kg; chloride (Cl-): ≤50 mg/kg; sulfate (SO42-): ≤0.03%; sulfate (SO42-): ≤100 mg/kg; sulfate (SO42-): ≤200 mg/kg; sulfate (SO42-): ≤50 mg/kg; sulfate (SO42-): ≤5000 mg/kg
• Shelf Life: (limited shelf life, expiry date on the label)
• Loss on Drying: ≤0.5% loss on drying, 105 °C
• Quality: ampule; volumetric
• Product Line: BioUltra
• abs.: absorption1M/504 nm, H2O cut-off
• Linear Formula: K2CrO4

DETAILS

MP Biomedicals - 02194875

ACS Reagent Grade
Purity: >99%
NOT FOR EXPORT

Sigma Aldrich - 529508

Packaging
100 g in poly bottle

Sigma Aldrich - 35157

Caution
Restricted to professional users. Attention - Avoid exposure - obtain special instructions before use.
General description
Visit our Titration Center to learn more.

Sigma Aldrich - 02673

Preparation Note
prepared with K2CrO4 and H2O

Sigma Aldrich - 03377

Preparation Note
prepared with K2CrO4 and H2O

Sigma Aldrich - 216615

Packaging
100, 500 g in poly bottle